SU1379650A1 - Tweezers for checking the strength of soldered wire connections - Google Patents

Abstract

The invention relates to a measurement technique and makes it possible to improve the performance of a device. The test wire 1 is fixed in the jaws 2 due to the force of the spring 5. The jaws 2 are mounted on the axis of rotation 4. on which is fixed the shank 7 with annular spherical grooves. When controlling the strength of the paired wire connections 1, the balls 9 placed in the hollow cylindrical body 8 of the force determination mechanism, spring 12 through the tapered sleeve 11, are pressed against the hardened washer 10 and hold the shank 7 with a predetermined force, the entrance to its grooves. If this force is exceeded, the shank 7 jumps out of the body, which indicates good quality of the soldering. The tension adjustment of the spring 12 is made by a movable threaded nut 13, on which a freely rotating ring 14 is placed with a pointer of specified force — a flag 15 entering the digitized groove of the housing 8. 2 ip. i (L

Description

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The invention relates to a measurement technique and is intended to control the strength of soldered wire connections.

The purpose of the invention is to increase the productivity of the control.

Fig, 1 shows a longitudinal section of the device; in fig. 2 - part of the body with a scale, top view,

Tweezers for controlling the strength of the paired connections of wires 1 contains gripping jaws 2 and handles 3 mounted on the axis A of rotation and spring-loaded 5; On the axis 4 of rotation there is also a plug 6 with a shank 7 with circular spherical grooves. The shank 7 enters the mechanism for determining the magnitude of the force, which is made in the form of a hollow cylindrical body 8 with balls 9 placed in it. The latter are clamped between a red-hot washer 10 resting on the end cover of the body and a red-hot conical bushing 11. the balls are spring 12 compressed, the tension adjustment of which is carried out by a cylindrical sleeve made in the form of a movable

a threaded nut 13 moving in position so that, in order to increase cutting in the internal cavity of the housing 8, a freely rotating ring 14 with a setable pointer flag 15 is mounted on the threaded nut. The ring 8 has a digitized groove 17 which includes box 15;

Tweezers works as follows. Preliminary, on the calibration stand, by rotating the threaded nut 13, the position of the spring 12 is adjusted to a predetermined pull-out force. The flag 15 is set at a predetermined force, rotating the threaded nut 13, the gripping jaws are fastened to the wire 1. Due to the force of the spring 5, the wire is reliably fixed in the tweezers.

Tweezers are taken over the body and tugged, while the balls 9 due to the force of the spring 12 through the tapered sleeve 11 are pressed simultaneously to the red-hot washer 10 and, entering the spherical grooves of the shank 7, hold it with a predetermined force. When this force is exceeded, the balls click and the shank jumps out of the body. This suggests that the quality of the soldering is good. Insert the shank into the housing, fix the next wire with the jaws 2 and repeat the process. Thus, the operator does not look at the scale when working with tweezers; it is enough to fix the jaws on the wire and pull the handle. This reduces the time required to control the strength of the soldering and significantly increases the ease of operation.

Claims (1)

Invention Formula Tweezers for controlling the strength of paired wire connections, containing spring-loaded gripping jaws mounted on an axis, and a force detection mechanism that distinguishes 5 0 five performance, the mechanism for determining the force is made in the form of a hollow cylindrical body and a shank hinged to the axis passing through a hole in its face collar, circular spherical grooves interacting with balls sandwiched between the body lid and the conical sleeve, which are connected by means of a compression spring with an end face of a cylindrical sleeve disposed in the housing with the possibility of movement and fixation, with a hole in its axis, in which a tail is placed Hvik and on its outer surface is a pointer of a specified force placed in a digitized groove made in a cylindrical body. f TUM || / 7} 5 FIG. 2